Ch. 9 And 10

Front 1

Skeletal muscle tissue:

Attaches to ____ and ____

Striated or Not Striated ?

Voluntary or Involuntary?

Back 1

Attached to BONES and SKIN

Striated

Voluntary (conscious control)

Powerful

Front 2

Cardiac Muscle Tissue:

Only in _____Striated or Not Striated ?Voluntary or Involuntary?

Back 2

Only in the heart

Striated

Involuntary

Front 3

Smooth Muscle Tissue:

In the walls of ________Striated or Not Striated ?Voluntary or Involuntary?

Back 3

In the walls of hollow organs, e.g., stomach, urinary bladder, and airways.

Not Striated

Involuntary

Front 4

Excitability

Back 4

(Responsive or irritability): ability to recieve and respond to stimuli.

Front 5

Contractility

Back 5

Ability to shorten when stimulated

Front 6

Extensibility

Back 6

Ability to be stretched

Front 7

Elasticity

Back 7

Ability to recoil to resting length

Front 8

Muscle Functions

Back 8

1. Movement of bones or fluids

2. Maintaining posture and body position.

3. Stabilizing joints

4. Heat generation

Front 9

Each muscle is served by _____

Back 9

Each muscle is served by one artery, one nerve, and one or more veins

Front 10

What are the Connective tissue sheaths of skeletal muscle ?

Back 10

Epimysium, Perimysuim, Endomysuim.

Hint 10

There is three: P.E.E

Front 11

Epimysium

Back 11

Dense regular connective tissue surrounding entire muscle.

Front 12

Perimysuim

Back 12

Fibrous connective tissue surrounding fascicles (groups of muscle fibers)

Front 13

Endomysium

Back 13

Fine areolar connective tissue surrounding each muscle fiber.

Front 14

Back 14

Know the Muscle parts.

Front 15

Back 15

Front 16

Myofibrils

Three characteristics

Back 16

Densly packed, rodlike elements

80 % of cell volume

Exhibits striations: perfectly aligned repeating series of a dark A bands and light I bands.

Front 17

Back 17

Myofibril

Front 18

Sarcomere

Three characteristics

Back 18

Smallest contractile unit (functional unit) of a muscle fiber.

The region of a myofibril between two successive Z discs.

Composed of thick and thin myofilaments made of contractile proteins.

Front 19

Thick filaments

Back 19

Run the entire length of an A band

Front 20

Thin filaments

Back 20

Run the length of the I band and partway into the A band.

Front 21

Z disc

Back 21

Coin-shaped sheet of proteins that anchors the thin filaments and connects myofibrils to one another.

Front 22

H zone

Back 22

Lighter midregion where filaments do not overlap.

Front 23

M line

Back 23

Line of protein myomesin that holds adjacent thick filaments together.

Front 24

Back 24

Enlargements of one sarcomere

Front 25

Back 25

Longitudinal section of filaments within one sarcomere of a myofibril

Front 26

Myosin tails contain

Back 26

2 interwoven, heavy polypeptide chains

Front 27

Myosin heads contain

Back 27

2 smaller, light polypeptide chains that act as cross bridges during contraction.

Binding sites for actin of thin filaments

Binding sites for ATP

ATPase enzymes

Front 28

Insertion

Back 28

Attachment to movable bone

Front 29

Origin

Back 29

Attachment to immovable or less movable bone.

Front 30

Direct (fleshy)

Back 30

Epimysium fused to periosteum if th bone or perichondrium if cartilage.

Front 31

Indirect

Back 31

Connective tissue wrappings extend beyond muscle as ropelike tendon or sheetlike aponeurosis

Front 32

Sacolemma

Back 32

Muscle fiber plasma membrane

Front 33

Sacroplasm

Back 33

Muscle fiber cytoplasm

Front 34

Contains many glycosomes for glycogen storage as well as myoglobin for O2 storage.

Back 34

Muscle fiber

Front 35

Modified organelles

Back 35

Myofibril, Sacroplasmic recticulum